Oil burner



Sept. 8, 1942. D. A. JONES r 2,295,501

OIL BURNER Filed Sept. 3, 1940 David 99. cfone s MM v Patented Sept. 8,1942 i UNETED STATES PATENT OFFICE OIL BURNER David A. Jones, WebsterGroves, Mo. I Application September 3, 1940, Serial No. 355,228

3 Claims.

This invention relates to oil burners and more particularly to animproved oil burner structure and an improved means for vaporizing oratomizing the oil in a furnace.

An object of this invention is to provide a burner or nozzle, which isadapted to be connected to an oil supply line and which is also adaptedto be connected to a steam forming coil, so that the steam formed in thecoil will provide the necessary suction means for withdrawing the oilfrom the oil supply source.

Another object of this invention is to provide an improved oil burnerstructure, which may be easily and quickly mounted in a conventionalfurnace structure and which eliminates the use of any moving parts inthe furnace so that the burner will not readily get out of order.

A further object of this invention is to provide an oil burner structureincluding an oil vaporizing nozzle and means for generating steam, sothat the steam may not only form a means for preheating and atomizing orvaporizing the oil, but also form a means for withdrawing the oil fromthe supply source.

A still further object of this invention is to provide a burner of thistype including a means for initially generating steam in the steamgenerator, the means for initially generating steam being in the form ofa pilot burner, which may be connected to a source of gas or othercombustible fuel supply.

To the foregoing objects and to others which may hereinafter appear, theinvention consists of the novel construction, combination andarrangement of parts, as will be more specifically referred to andillustrated in the accompanying drawing, wherein is disclosed anembodiment of the invention, but it is to be understood that changes,variations and modifications may be resorted to which fall within thescope of the invention as claimed.

In the drawing:

Figure 1 is a detail side elevation of a burner structure constructedaccording to an embodiment of this invention mounted in a conventionalfurnace structure, and

Figure 2 is an enlarged fragmentary longitudinal section taken throughthe nozzle and the lower portion of the steam generator or boiler.

Referring to the drawing, the numeral I designates generally a furnaceof conventional construction, it being understood that the hereinafterdescribed invention may be mounted in any suitable furnace, which mayinclude a feed door structure ll, clinker door structure l2 and ash doorstructure l3. The furnace It may either be a hot air or hot waterfurnace, or if desired maybe a small steam boiler.

A steam generator or coil, generally designated as M, is adapted to bepositioned within the interior of the furnace l0 and the generatorv I4in the present instance is constructed from a single length of pipe,whichis bent in substantially V- shape with one side It thereof adaptedto be in an uppermost positionand inclined to the horizontal and theother side It thereof, which is connected to the upper side it by anarcuate connecting member I1, is inclined to the horizontal and inclinedreversely' from the inclination of the upper side 15. The upper side i5is adapted to be. connected by means of a coupling l8 to a water supplypipeline 19. A cutoff valve ii! is interposed in the water supply line19. and at a point between the cutoff valve 20 and the coupling [8 awater limiting valve 2| is interposed in the pipe line [9. A pressuregauge 22 may be connected to the pipe line l9 between .the coupling 18and the limiting valve 21.

At a point between-thetwo va1ves20 and 2!, I have preferably provided anelectrically operated valvemember 23, which may be connected to asuitable source of electric supply and this valve 23 may beof a typewhich will automatically cutoff the water supply in the pipe I9iundertemperature conditions or the like. The valve structure 23 is aconventional electrically operated cutoif valve, the details of whichare well known. A pressure reducing valve 24 is interposed in the pipel9 between th valve 2! and the electrically operated valve 23, so. as toreduce the pressure from the water supply before the water passes thelimiting valve 2|. By means of the pressure reducing valve 24, which isof conventional construction, the water passing the limiting valve 21will gravitatingly flow through the remainder of the pipe I9 and thendownwardly through the steam generator member I5 through the arcuateconnecting member I! and into the lower steam generating member l6.Preferably in order to retard the flow of water. in the generator l4 andto also. assist in more rapidly generating steam within the generatorI4, I have mounted in the generator [4 a plurality of wire strands 25.These wire strands are preferably formed of metal which is highly heatconducting so as to assist in the. rapid generationlof steam within thegenerator [4.

A combined oil burner and atomizing nozzle, generally designated as 25,is adapted to be positioned within the furnace Ill at a point slightly.which is secured to the lower member above the lower generator memberI6 and in a position substantially parallel with the generator memberIS. The nozzle member 26 comprises an outer nozzle member 21 in the formof a cylindrical body, which at its forward end is formed with a jet orfrusto-conical member 28. The rear end of the cylindrical member 27 hasmounted thereon a cap 29 threaded onto the outer nozzle member 21. Aninner steam nozzle member 30 is disposed coaxially within the outernozzle member 21 and is formed, at its forward end, with a jet member3|, which is positioned slightly inwardly from the forward end of thejet member 28. The steam nozzle member 30 extends axially through therear wall 32 of the cap 29 and is connected to an L coupling member 33.

A short pipe member 34 is connected to the L 33 and the pipe 34 isconnected to one side of a second I. 35. The L 35 has a nipple 36mounted in the other side thereof and the nipple 36 engages in a rearwall 31 of a cap 38. The cap 38 is threaded onto the lower or rear endof the lower generator member IS. The steam nozzle member 30 may besecured in the end wall 32 in any suitable manner, such as by welding 39or the like.

The outer nozzle member 21 has secured thereto, at a point intermediatethe ends thereof and preferably at a point closely adjacent the rearend, a laterally extending intake nipple 40. The nipple 40 is connectedto one side of an L 4! and a fuel supply pipe 42 is connected to theother side f the L 4|. The supply pipe 42 may have a cutoff valve 43interposed therein and is adapted to be connected to a reservoir 44. Thereservoir 44 is in the form of a small tank, which is adapted to beconnected by means of a pipe 45 to a main supply tank. The oil ispreferably discharged into the tank 44 by gravity.

In order to provide a means whereby steam may be initially generated inthe steam generator I4, I have provided a gas burner member 46positioned below the lower generator member l6,

l6 by means of a bracket member 41. The burner 46 may be disposed insubstantially parallel relation with the lower member l6 on thegenerator and is adapted to be connected to a supply pipe 48, which hasa cutolf valve 49 interposed therein.

In the use and operation of this burner structure the pilot burner 46 isinitially lighted by opening the valve 49 so as to permit gas or otherfuel to pass to the burner 46. The valve 20 may be initially opened andthe valve 2| also initially opened to the deslred degree, so as topermit the water to gravitatingly flow through the pipe l9 and then downthrough the upper generator member l5 through the arcuate connectingmember I1 and into the lower generator member [6. The electricallyoperated valve 23 may be controlled by a thermostat, or other suitableelectrical means, which will cut oif the flow of water when the desiredtemperature at a particular point has been attained. The wire strands 25in the generator l4 will assist in the generation of steam and aftersteam has been generated, this steam will pass through the nipple 36,the coupling member 35, the short pipe 34, the coupling member 33 andpass through the steam nozzle or jet member 38. The steam will be dis--charged from the jet 3| of the nozzle member 30 and as the steam isdischarged through the open end 50 of the jet 28, it will act to drawoil through the pipe 42 and nipple 40 into the nozzle member 21. Thedischarging steam will not only act in a manner as aforesaid, but willalso act as a. means for preheating the oil and in addition for breakingup the oil into a spray. In this manner the oil will readily ignite andonce the oil has been ignited, the flame from the burner member 26 willbe discharged in the direction of the arcuate connecting member I! ofthe generator l4.

This will have the effect of generating steam in the arcuate connectingpart II. After the burner 26 has been ignited and sufficient steamgenerated to draw in suificient oil from the tank 44 to operate theburner 26, the pilot burner 46 may be cut oif. The back pressure fromthe generator l4, which extends through the pipe 13 to the valve member2| and the pressure reducing valve 24, will have the effect ofautomatically controlling the amount of water which will pass to thegenerator I4. This amount of water may also be controlled by regulationof the pressure reducin member 24 and the limiting valve 2|.

A burner structure constructed according to this invention may bepositioned in any conventional furnace structure, and as there are nomoving parts in the generator or burner proper, the device will notreadily get out of order. This burner may be constructed at a relativelysmall cost in View of the simplicity of its construction and thesimplicity of its operation.

The position and form of the generator l4 allows the water to freelyflow by gravity from the upper end to the lower end of the generator,except for the loose strands of wire 25. The strands 25 coact with thegenerator l4 in effecting a quick exchange of heat so that there willnot be formed any trapped water or trapped steam. This novelconstruction makes the burner structure particularly adaptable toautomatic operation. The automatic control of the water passing to thegenerator controls the section of oil so that more or less flow of waterwill have a corresponding effect on the flow of oil.

The burner structure may be cut off by either 3 cutting off the flow ofWater which will cut off the suction of oil, or the oil valve may beclosed.

What I claim is:

1. A steam generator for connection to an oil atomizing nozzlecomprising a V-shaped steam generator having its legs disposed insuperposed relation and its base upstanding and merging into the innerends of said legs, a closure cap on the outer end of the lower one ofsaid legs, and a tubular steam conductor connected to said cap and tosaid nozzle, said conductor supporting said nozzle closely adjacent toand in parallel relation with respect to said lower leg whereby theflame emanating from said nozzle will encompass the inner portion ofsaid lower leg and impinge against the lower portion of said base.

2. A steam generator for connection to an oil atomizing nozzlecomprising a V-shaped steam generator having its legs disposed insuperposed relation and its base upstanding and of longitudinallyarcuate configuration, and merging into the inner ends of said legs, aclosure cap on the outer end of the lower one of said legs, and atubular steam conductor connected to said cap and to said nozzle, saidconductor supporting said nozzle closely adjacent to said lower legwhereby the flame emanating from said nozzle will encompass the innerportion of said lower leg and impinge against the lower portion of saidbase.

3. A steam generator for connection to an oil atomizing nozzlecomprising a V-shaped steam generator having its legs disposed insuperposed relation and its base upstanding and merging into the innerends of said legs, a closure cap on the outer end of the lower one ofsaid legs, a tubular steam conductor connected to said cap and to saidnozzle, said conductor supporting said nozzle closely adjacent to saidlower leg whereby the flame emanating from said nozzle will encompassthe inner portion of said lower leg and impinge against the lowerportion of said base, and a plurality of metallic strands possessing ahigh heat conducting characteristic arranged in said lower leg.

DAVID A. JONES.

